Author note: Thanks so much for following this story. I'll try to update Iron Innovator before this month is done. In this story you don't go to UA till you're 16. For powers Izumaou will really only have a weak strength enhancement, it's enough to get into UA. Due to Maou being his stingy self he won't be pulling off epic magical attacks unless it's life or death.

Fencer29: They will go to UA but Izuku does have a part time job at MgRonalds due to an event that will be discussed in this chapter. I was going off the translated light novels since they also call him devil king. Yeah they will have disagreements as it's two souls in one body...For now... and from time to time one might overpower the other like say Izuku's strong sense of justice might overpower Maou and give Izuku control.

MasterBlade47: I think Chiho deserves her time to shine and be something more than a side character.

Chapter 2

"You will not be trapped in your body; you will have just as much control as I over the body so that's why I want us to come to an understanding. With my powers you can be a hero. Do you accept?" The Devil king brought his hand out to be shaken.

The thought of sharing a body with the Devil King was frightening but if he didn't he would die. 'Would they still consider me a hero if I looked like that?' Izuku thought looking at Satan's horns, red eyes, and claws. He started to mutter up a storm about pro's and con's on the deal but he came to an eerie thought.

"Yo..you said if you can get back it would affect me as well correct? Why is that?" Izuku was cautious he had read stories where such deals were merely tricks.

"Ah not eager to rush into danger without knowing the facts hmm. Alright. The spell I will use might fuse our souls together one day could be a few days, a few months or even a year. It all depends on how accepting you are of the other person aka me." Satan waved his hand as he spoke.

"W...What!? But….but….what would happen to me then when they fuse?" Izuku was terrified he believed he could lose himself.

"Not sure to be honest." Satan sat forward thinking.

"If you aren't sure why offer this deal you could lose yourself?" 'Or myself' Izuku didn't want to die and this seemed just like a prolonged death sentence.

"It was on a whim. You reminded me of a demon boy I knew. You see we demons were treated like monsters like we didn't belong even though we shared our world with humans since the beginning of time. He thought he could befriend humans but they scorned him, mocked him, and even attacked him. You reminded me of him because like you and your... limitations he never gave up but in the end it didn't work." Satan's gaze turned down and for a while all was quiet until he spoke again. "My best guess is we will keep both of our memories while certain powerful trait's would take over like say my confidence would overrule your anxiety. There may be a way to reverse it but I know not one that is why I said this would affect you should I return as you may have to return with me. If only I had more magic I might have been able to save you fully. So what do you say?" Reaching his hand out once more.

'If I don't I'm dead.' "Deal!" Izuku grasped the outstretched hand and was blinded by the light. The next thing he knew he was standing over a charred smug on the ground. He felt taller not by much though.

"Sire? Is that you? What happened?" A voice he recognized asked in fear and astonishment.

"Indeed Alciel. I used a spell to join my soul with this childs. This world we are in is quite interesting." Izuku spoke with Satan's voice. 'Oh god this is so strange!' 'Indeed Izuku we are one but separate for now. Heh I doubt you want to tell people you're speaking to Satan so just call me Sadao.' 'Alright'

"What do you mean?" Alciel asked with a hint of curiosity.

"Walk with me. We have to get you official paper's incase we get stopped by the authorities here. I'll explain while we walk." Sadio said while leaving the alley. Sadio spoke of quirks and how society changed to include them causing the rise of heroes and villains. He spoke of Izuku and his hope to become a hero and how his dreams were shattered when his idol told him he never could since he was what was called quirkless. He explained the deal they made and what would be happening.

"HAHAHA! If only Emilia could hear the great Devil King speaking about becoming a hero! But this leads me to ask what of me? What should I do." Alciel now legally Shirō Ashiya asked.

'What should we do? I was thinking of using what little magic I have left in convincing your mother to let him stay.' Sadio mentally asked Izuku. 'That should work, she's been having trouble since… she got sick. She's better now but…' Izuku trailed off and sadao just nodded.

"Well Alciel I would like you to help out around the… my house. It seems...my mother got sick and hasn't been the same since." This was all still rather odd to Sadao as well.

"Of course Sire! It would be my pleasure to assist your honored mother!" Alciel was taking this well. The Devil King was now this Izuku Midoriya which meant it was now his job to protect his leiges mother. They continued their walk home until they heard explosions off in the distance.

"Sire is the city under attack?!" Alciel was prepared to fight to the death for Izuku/Satan.

"No it's a villain attack lets go, this will be a good chance to get notes and for you to learn what this world is like." Izuku was in control now. With Sadao's promise he was feeling more confident now. They rush to the shopping center where the explosions are coming from just to see something that turns izuku's blood to ice. "The...the sludge villain."

"What was that sire?" Alciel leaned down to hear him better over this crowd.

"It's all my fault if i hadn't grabbed onto All Might he wouldn't be free." Izuku was trembling and berating himself. Sadao was about to take over to keep Izuku calm but was stopped. "No...Kacchan. Why why isn't anyone helping that monster has Kacchan?" All around them people were asking why the heroes were doing nothing while the heroes made excuses on how their quirks wouldn't work. A split second later and Izuku's head felt like someone was driving nails through it. "AHHHHHHHHHHH!" He dropped to the ground clutching his head. People rushed to him to see what was wrong one of the heroes was calling for paramedics. What felt like an eternity later the pain was gone. Izuku felt lighter, his head was a little heavier. He looked around to see no one had helped yet. Without thinking Izuku rushed forward out of the crowd with people telling him it was dangerous but he didn't listen. He threw a rock from the ground at the sludges eye.

"You look familiar oh well if you want to die so be IT!" the villain swung a tendral of sludge at him. Izuku barely dodged falling to the ground but he pushed himself up and got to Bakugou. He grabbed one of his arms yanking the ash blonde out of the villain.

"ARGH my hostage! You'll die, you damn insect!" The sludge attacked again but was blown away by a punch.

"HA HA SORRY I'M LATE YOUNG MAN LET ME HANDLE IT NOW! FOR I AM HERE!" The booming voice of All Might boasted as he delivered another punch causing it to rain. After everything was over the media swarmed All Might and the Paramedics took away an unconscious Bakugou. The rest of the heroes had cornered Izuku and were telling him how dangerous his stunt was.

"Sorry my body just moved on it's own." Izuku bowed and apologized.

"Kid are you sure you're ok? You were screaming earlie… UH GUYS LOOK!" Death Arms pointed at Izuku's head. Izuku was confused as to why he was pointing at his head. He started moving his hands on his head to see if he was bleeding and he stopped when he found a broken stump on one side and a larger pointed bit on the other. He quickly pulled out his phone with the front facing camera and his jaw dropped.

"I HAVE HORNS?!" Izuku shouted in fear. 'HUH BUT HOW?! I don't have enough magic to transform?' Sadao was just as confused.

"YOU DIDN'T HAVE THEM BEFORE?!" all the other heroes around him asked. Izuku just shook his head. "How's that possible mutation quirks are usually known at birth either by signs or their mutation already showing?" Mt Lady was thinking out loud.

"Maybe it's a transformation quirk? Can you try concentrating to make them go away kid?" Kamui Woods inquired. Izuku did just that but no matter how hard he thought nothing happened.

"Sorry nothings happening."

"That's fine kid. How about you follow me back to my office? It's just a few blocks away and I can get a doctor to give you a check up." Death Arms offered.

"Oh sorry sir I work today I'm helping my coworker learn how to use the ice cream machine. I can't be late." Izuku apologized before running off.

'Smooth. No idea what a doctor check up would show since we are a demon.' Sadao thought. 'Yeah there's that but I wasn't lying. I really do work today.' Izuku shot back.

"Sire? Where are we going?" Alciel asked. Izuku immediately facepalmed 'With all that happened I forgot all about him.'

"Well I work in 40 minutes so i have to get there. Hmm there's a library down the street. How about I meet you there after work. You can study history and stuff so you'll know more of this world." Izuku offered some money for a card for Alciel.

"You are most wise sire. I shall do just that." Alciel bowed. Izuku pointed to the library and told him his shift ended at 9 and went on his way. As he was opening the door to MgRonalds he thought 'I can't wait to see Chi-Chan... wait oh shit my horns! I need A new hat! Dammit that's going to cost money.' the manager looked up from the register.

"Hello sir what can i get for yooo… Izuku? You know we don't allow costumes, take those horns off and get ready." She spoke with a friendly yet stern commanding voice.

"Uh about that. It seems that my quirk finally showed up. These horns are real." Izuku tugged on the non broken one to emphasise the point.

Author Note: Emi will make an actual appearance soon. How will Izumaou deal with that? Will she realize? Who knows. I've done some voting for pairs amongst my friends who help with idea's and so far it's:

2 for Izumaou X Chiho

1 for Izumaou X Emi

1 for Izumaou X Chiho X Emi